It's true that the lower gears of a derailer setup provide more torque to the rear wheel, but in that case the force is being applied closer to the centerline of the hub, so it's affecting both dropouts equally. With a SS/fixed setup, the cog is typically right at the right dropout (no matter the OLD spacing), so the force is more concentrated on one side. Despite the higher gear i run on ss/fixed bikes (as compared to multi-gear bikes), i have had slippage when starting out if the q/r isn't really tight. I agree than there's less fear in mashing a gear when there's no (knock on wood) chance of the chain jumping off. Q/Rs have been ok, still, I've converted my 2 current SS bikes over to nutted hubs.
-- Bill Connell St. Paul, MN On Wed, Feb 25, 2009 at 7:53 AM, Todd Olsen <todd_ol...@comcast.net> wrote: > > I think this is why the axle may be more likely to move on a > singlespeed. The chain, while pedaling forward, pulls the axle both > forward and up. The force, resisting forward or trying to pedal > backward, pulls the axle both forward and down. Since there is a tiny > bit of play, everytime it makes the transition from up to down and > vice versa, it will slip forward a little, as well. > > Having a derailer and access to large rear sprockets will actually > increase the force pulling the rear axle forward and up due to the > increase leverage of applying the force farther from the axle. > Pedaling harder will linearly increase the force applied to the rear > axle, but shifting to a larger rear sprocket will multiply the force > on the rear axle. > > Todd Olsen > > On Feb 24, 5:10 pm, Invisible <brooks.wes...@gmail.com> wrote: >> I may be drifting off topic, but: >> >> On my dinglespeed (Redline Monocog 29er, not a Quickbeam), grinding up >> steep hills in the lower gear will sometimes cause the rear wheel to >> slip forward - and this is with a bolt-on axle. Here's my theory: with >> no derailer, there's no worry of spurious gear-hopping so I worry less >> about how much torque I put on the cranks, and so I crank harder. For >> this reason I can put a lot more force into a derailer-less bike. So >> there might be something to the idea that wheel slippage is a greater >> threat w/o a derailer. >> >> -Wesley > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
